Injection device used for blow molding hollow plastic bodies, comprising extrusion mandrels that can be tempered and are inserted into extrusion mandrel fastener

An injection device used for example for blow molding hollow plastic bodies, comprising temperature-controllable blowing mandrels inserted in a blowing mandrel holder, the blowing mandrel holder having cylindrical recesses, in each of which a blowing mandrel is fixedly held, and the blowing mandrel holder and the blowing mandrels having respective channels which communicate with one another in twos, in order to make possible a fluid circulation for controlling the temperature of the blowing mandrels, characterized by a two-part design of the blowing mandrel holder with a supporting bar and a holding bar, which can be joined onto each other and fastened and can be released from each other and each have an identical number of half-cylindrical recesses, which complement one another in the blowing mandrel holder to form cylindrical recesses, in each of which a blowing mandrel can be inserted when the supporting bar and the holding bar are released from each other and is fixedly held when the supporting bar and the holding bar are fastened on each other, and by connecting pieces in the form of cylindrical sleeves, which seal the fluid circulation with respect to a gap forming between the blowing mandrel and the supporting bar or the holding bar and also hold the blowing mandrel fixedly on the blowing mandrel holder and further comprising a two-part design of the holding bar with a blowing mandrel connecting bar and a fluid connecting bar provided with an opening, which can be joined onto each other and fastened and can be released from each other and have respective channels, which communicate with one another in the holding bar in order to make possible a passage of the fluid circulation from the opening provided on the fluid connecting bar to and through the channels arranged in the supporting bar and in the blowing mandrels up to an opening provided on the supporting bar.

An injection device used for example for blow molding hollow plastic bodies, comprising temperature-controllable blowing mandrels inserted in a blowing mandrel holder, the blowing mandrel holder having cylindrical recesses, in each of which a blowing mandrel is fixedly held, and the blowing mandrel holder and the blowing mandrels having respective channels which communicate with one another in twos, in order to make possible a fluid circulation for controlling the temperature of the blowing mandrels, characterized by a two-part design of the blowing mandrel holder with a supporting bar and a holding bar, which can be joined onto each other and fastened and can be released from each other and each have an identical number of half-cylindrical recesses, which complement one another in the blowing mandrel holder to form cylindrical recesses, in each of which a blowing mandrel can be inserted when the supporting bar and the holding bar are released from each other and is fixedly held when the supporting bar and the holding bar are fastened on each other, and by connecting pieces in the form of cylindrical sleeves, which seal the fluid circulation with respect to a gap forming between the blowing mandrel and the supporting bar or the holding bar and also hold the blowing mandrel fixedly on the blowing mandrel holder and further comprising a two-part design of the fluid connecting bar with a body having channels and a cover, which can be joined onto each other and fastened and can be released from each other, the channels being formed as grooves which are provided on the body and covered over by the cover and the opening provided on the fluid connecting bar being arranged on the cover.